Home / 257,947.04-386,868.72-80,425.28

Finding the Fourth Proportional to 257,947.04, 386,868.72 and 80,425.28

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Solution

The fourth proportional to 257,947.04, 386,868.72 and 80,425.28 is: 120,621.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,947.04 : 386,868.72 = 80,425.28 : x
  2. Step 2: Convert to fraction form
    257,947.04/386,868.72 = 80,425.28/x
  3. Step 3: Cross multiply
    257,947.04x = 386,868.72 × 80,425.28
  4. Step 4: Simplify right side
    257,947.04x = 31,114,025,129.24
  5. Step 5: Solve for x
    x = 31,114,025,129.24/257,947.04
  6. Step 6: Final answer
    x = 120,621.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.